According to the Sleep Foundation, the average night’s sleep is 6.8 hours (, March 20, 2012). Assume the standard deviation is .5 hours and that the probability distribution is normal.
According to the Sleep Foundation, the average night’s sleep is 6.8 hours (, March 20, 2012). Assume the standard deviation is .5 hours and that the probability distribution is normal.
According to the Sleep Foundation, the average night’s sleep is 6.8 hours (, March 20, 2012). Assume the standard deviation is .5 hours and that the probability distribution is normal.